Fire extinguisher



FIG. 1 is a right front downward perspective view of a fire extinguisher according to my new design;

FIG. 2 is a right elevational view thereof;

FIG. 3 is a left elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom elevational view thereof. 

The ornamental design for a fire extinguisher, as shown and described. 